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Consolidated Statements of Operations Parentheticals (Unaudited) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stock-based compensation expense associated with research and development expense	$ 823	$ 751	$ 2,480	$ 2,366
Stock-based compensation expense associated with general and administrative expense	$ 609	$ 582	$ 1,874	$ 1,592

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Stock-based compensation expense associated with general and administrative expense.

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- Definition

Stock-based compensation expense included in research and development expense.

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